Centrotherm Eco Systems InnoFlue® IFVL04040 Flexible Vent Length, Polypropylene, 4 in ID x 4.3 in OD Dia x 40 ft L, Gray, Domestic

Manufactured from polypropylene. 4 in Flex features rigid sections every 2 ft. 4 in Flex can be field cut and are ideal for use in chimneys with offsets. The base of your 4 in Flex can be connected to InnoFlue® SW at any rigid section without a coupler. Flex to Flex couplers are available for extended runs.